Fastener-inserting machine.



l poses, which will be simple'in.constructionV UNITED sTATEs PATENT onirica.

JULIUs c. Tomi-11A, or HAzLEToN, PENNSYLVANIA.'

and has special reference to improvementsl in machines of the:type shown in Patent No. 1,091,298, granted March 24, 1914 to G.

' 'v gage and feedthe same. In order to main-i tain the string of fasteners in its proper A.vand S. A. Dobyne.

The particular object of the y'present iinprovements islto provide means whereby thev blade carrying arm will be positivelymoved.

to engage and feed the nails and also to pro-y 4videine'ans whereby 4the blade will be effectually restrained so as to withstand the shock placed thereon while severing a 'nail' from the string 0f nails.- The invention also seeks to provi and readilymanipulated to permit ment of the blade.

The invention is illustrated in the vaccompanying drawings, in which- Y Y y l Figure 1y is an elevation of so much of a nailing machine asis deemed necessari,T to a adj ust-l complete understanding of my improve' ments. i

Fig. 2 is a detail perspective view `of the' bracket and adjusting screw employed inthe application ofmy invention.` .j

The nailing machine lcomprises a standard 1, on which is provided` a guide 2 for the fastener stock or string lof. nails, a portion of Vwhich is shown at 3.' An operating lever 4 y. 40

is fulcrumedat and vibrated b v suitable cam mechanism, which` is not lillustrated herein as it forms no part of my invention. To .the lower endof the lever 4 is pivoted, as at 6, a. knife-carrying arm 7, the said arm being provided at its'lower endwith clamping plates 8 which engage Athe side edges of the ,feeding and cutting blade 9 andl are secured to thejarm, so as toclamp the blade, by a 'screw or similar fastening 10. In the operation of the machine, as .the lever y4 moves upwardly, the blade-carrying arm 7 is intended to move about its pivot 6 so that the blade will ride upwardly along the guide 2 and engage the head of a nail so that, upon the return movement, the nails will be fed t0 the work, the continued movement of the Specification of Letters Patent.

dea device for the: stated purdle 19, of any vconvenient Patented Aug. 6,1918.

Application led October 23, 1917. Serial No. 198,121.

driving mechanism causingthe blade to sever the lowest nail from the string." To cause the blade carrying arm to'positively perform this allotted function, I employ a coil spring 11 which is connected at its lower end with the screw 10 andhas its upper end attached tothelever'4, asy clearly shown.

' Ity will be noted. that this spring lies sub .stantially parallel .withthe stock or string of fasteners and will therefore exert a direct upward pull upon the blade sothat the blade will not bev apt to move away from the fasteners but .will be held to and positively enposition parallel lwith the said spring and guide or eye 12 which is'held' in place by the head of the fulcrum screw or bolt 5 so that the string of fasteners will extend in a straight line from the said upper guide to i -the main guide 2 and will not beliable to entangled with the retracting becpme spring 11.L

In the actual use of string nailing machines of the type noted', the blade would give way under the strain imposed thereon in cutting through the nails and would slide `en'dwise outwardly between the clamping plates' 8. To overcome this objection and to permit the blade to be adjusted so as to compensate for wear and properlyy cut through the nails, I provide an adjusting screw 13 which is mounted in the lower end of a bracket 14 and 'is held in a set position by ay lock nut* 15. The bracket 14 lconsists .of a substantially U-shaped' body or base portion 16, the members of which are adapt- 'ed to iit on Vopposite sides of the blade carryingarm 7, and a neck 17 extending downwardly from the said. base or body, an interf nallvthreaded eye or loop 18 being provided at' the extremity of said neck. The adjusting screw yor bolt 13 is inserted through and engaged in: the internally threaded 'eye 18 and 'is equipped at its outer endwith a hanmay` be vreadily rotated andthereby vcaused to move through the eye. The lock nut 15 will preferably be of circular form and equipped with a plurality of sockets 20,l in

which any convenient tool may be engaged form, whereby it the said arm, and having` a smooth unthread ed portion upon whiclr'thebracket may: turn f pivotally. At the forward corners of thebase portion, additional openings QQarelprovide'd" and a pin 23 is inserted through these opcn-. ings'andthe blade-carryingarm to retain thel the combination of a supporting' structure,Y

bracket in operative position.

It is thought the manner of using my ad- `i justing vdevice jwill be readily understood.

Tliefpin 23 is withdrawn and the bracket swung,` downwardly and outwardly about.`

the pivot screw 121, so that the adjusting thrust-screw 13 will be away from the blade.

The blade is` then'adjusted. so that it--will i have the proper lrelation to =thenails. after which thebracket is returned to its norm-al position, which is illustratedin Fig. 1. Y The adjustable thrust screw 13 is then rotated soVV as to move through thefeye 18 until its forward* end bears against the outer rear endof the Eblade, .asY clearlyA shown in Fig., 1.

Thefnut 20 is then rotated about the screw so that it will ride home againstthefforward side of "the eye 18 and will consequently hold the screw inits `adjusted position andby'itsf engagement with the fron-t i side of the eyelS, will prevent the screw-y moving,` rearwardly throughA the same; the blade 1consequently :being held `to its .work and prevented from: movingoutwardly bef tween the clampingfplates, `under the v Astrain placed thereon.

From the foregoingdescription,.taken in connectionv with `the accompanyingdraw-y ings, it will be seen that I have provided anf` exceedingly simple'device whichmay be readily applied to machinesfiiow in use andA by which the outward movement oftheknife-` will be positively prevented so. that after it has beenvonce adJusted, no further adjustment-will be needed eXcept to compensate'V for the ordinary wearl upon fthe cutting.

edge.' f The strain; upon the retaining` screwx 1() is very'matei'ially reduced so that said..-

screw" is not required toperf'orin` any work in holding-.t1ieblade in` positionV and need` be .only "heafvy enough Yto hold the clamping;

plates to tlieblade: Theblade will notbe supported` bythe plates' 8 alone, but fwill be` lie'ldI to its work by lthe Iadjustingiscrew .13, whichreceives the thrust. An unskilled workman may vreadjust the blade in` avery .z

few minuteslor maysubstitute a newl blade fora wornoutblade--without any great loss opiesoi `.thispatent may ybe obtained for a guide thereoiii'a lever fulcruined upon the supporting' structure above the guide, a second guide heldby the'. fulcruin` ofthelever" in `aliiiement with the first-mentioned guide,

a blade carryingl arm pivotedto the lower?y end of the lever,Y a blade carried by said arm to feed and sever fasteners .passing` through thesaid guides, a bracket secured" toaandv` above the lower end thereof,V a thrust-receive" ing member mounted in vthe lower end of projecting downwardlyfj from 'saidffarni 'f `said bracket "and heldthereby agaiiistithef bladey and in spaced' relation: to tlie;arni;"

means .on- .said memberi between. the jliil'aidey V and the bracket to engage thebracketfand prevent movement of the member: fromV the blade, and 4a retractile spring` havingfits lower end connected withthe lowerA endy "ofj" the blade carrying arm' and itsiipp'erl eii'dattached to'- the lever adJacenti thelfulcrumf thereofv whereby the' spring" will extend sub stantiallyparallel with a string of fasteners the combination vof a blade4 carrying-arm, a

blademounte'd upon. the lower endof said arm, a bracket secured to said arin"'aboveA the lower end thereof vand projecting downwardly therefrom and beyond the' underside thereof,v a thrust receiving member''thread-VIV ed through the llower-end Vofsaid bracket to bear against the rear 'end"of"the"blade" and a locking device mouiited'onthethrust` receiving member between .the blade, andthe' bracket to bear against theu front side ofthe bracket. Y V

3. 'In a machine' of the character set'fOrth', the combinationfof a bladecarryingarm, va blade mounted upon lower end of said I jecting beyond the' under'sideof same, means for holding the'7 bracketjnormally" against pivotal movement, apthru`st'receiv-'v .Y arm, a bracketpvoted tosaid ai'nigai'i'd* pre1' ing;` member mounted' 'in the'li'verend""of" said bracket and. bearinggagainst the outerend of the blade, `and ineansfor preventing outward movement of vsaid .thrustreceivin'g L member. I n I In testimony whereoflI aflixinysigiiaturei' JULIUS'C. TORCI-HA.rf [ns] ve ycanta each, by addressing' th"oiiixgm lsioxierfog Washington, D. ti. 

